Science Italian Style: Renaissance Machines at http://www.pbs.org/safarchive/4_class/45_pguides/pguide_503/4553_renaissance.html.

Museo di Vinci http://www.leonet.it/comuni/vincimus/index.html
Web site for the Leonardo museum in Vinci, Italy!

Leonardo at the Museum of Science in Boston http://www.mos.org/leonardo/index.html
Wonderful site with interactive activities relating to Leonardo. There are also good resources for science & math on their main web site.

Leonardo as Paleontologist http://www.ucmp.berkeley.edu/history/vinci.html

National Museum of Science & Technology in Milan http://www.museoscienza.org/english/leonardo/
Amazing site with information on and photos of many of da Vinci's inventions. Lots of other interesting info on the main part of the museum site.

MarcoGram - Leonardo http://www.thinkfinity.org/MarcoGrams/Apr2005.html
Class activities and links from Marco Polo site.

Team Documentation Activity on Leonardo http://score.rims.k12.ca.us/activity/leonardo/
Classroom activity wtih links for Leonardo.

Paris Web Museum - Leonardo http://www.ibiblio.org/wm/paint/auth/vinci/
Information on and photos of some of Leonardo's major drawings and paintings.

Virtual Exhibit - Leonardo http://www.leonardo.net/
Not a lot of information, but a fairly extensive collection with photos of his major works. This is probably a good site to get some photos for presentations.

ArtCyclopedia - http://www.artcyclopedia.com/history/high-renaissance.html
This site provides a listing of High Renaissance artists. The Leonardo da Vinci page has a link to a chronological list of Italian painters and inventors.

Mapping the Past (Lesson Plan using historical maps) http://edsitement.neh.gov/view_lesson_plan.asp?id=328

Golden Ratio Exercise http://illuminations.nctm.org/LessonDetail.aspx?ID=L510
Math lesson on ratios using Leonardo's Golden Ratio.

Quotations from Leonardo http://www.brainyquote.com/quotes/authors/l/leonardo_da_vinci.html